[root@dhcp-9-79 ~]# grep $'\n' log.txt 
[root@dhcp-9-79 ~]# grep $'\t' log.txt 

[root@dhcp-9-79 ~]# ls
anaconda-ks.cfg log.txt mno.txt original-ks.cfg
[root@dhcp-9-79 ~]# cat log.txt 
  ok
[root@dhcp-9-79 ~]# grep $'\n' log.txt 
  ok
[root@dhcp-9-79 ~]# grep $'\t' log.txt 
  ok